This guy usually uses ancient beater lawnmower engines to do his tests, but I see he went out and bought two brand new engines. Cool.

He has done this a few other times with new Harbor Freight engines, including one with Lucas against STP. This seems to be his new method of testing oil additives. I like this method since previous wear or damage won't influence the results.

He still uses old lawnmowers for testing fuel related things (such as a recent video on whether sugar in gasoline will damage an engine or trying to run an engine on something other than gasoline. Engine wear isn't as much of an issue with fuel tests, since durability isn't what is being tested.

This is a very interesting channel, and it is nice to see someone putting these things to the rest rather than just pushing a sponsored product.

I believe he ran oil/additive mix for the same time then drained and ran them "dry" to see what if any residual coating was left/soaked in,clinging ..whatever term used. Another with only oil that was drained would have helped with a baseline?

Originally Posted By: anndel

Originally Posted By: CT8

I guess the Lucas thickened the oil or made it clingy so more stuck to the parts.

He ran the engines without oil, only the Lucas in one and Z-Max in the other.

I know, I do so much to keep my OPE running good, this hurts. But maybe he's "smart" and put used oil in the crank case and returned them to Harbor Freight as being "defective", he has 30 days to do it. Not that anyone would be so dishonest to do so .